In a wireless communication system in which an AP and a plurality of STAs are connected to each other and the AP simultaneously transmits a wireless frame destined for each STA with FDMA, in which the AP includes a control frame transmission unit that generates a control frame having information on a frequency resource allocated to the each STA and transmits the control frame on a primary channel being used in a shared manner by the each STA and a wireless frame transmission unit that simultaneously transmits the wireless frame destined for the each STA on the frequency resource allocated to the each STA, and in which the STA includes a frequency resource selection reception unit that receives the control frame on the primary channel and receives a wireless frame destined for the STA itself on a frequency resource notified by the control frame.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A wireless communication system in which a wireless LAN access point (hereinafter referred to as an “AP”) and a plurality of wireless LAN stations (each of which is hereinafter referred to as an “STA”) are connected to each other and the AP simultaneously transmits a wireless frame destined for each STA with frequency division multiple access, wherein the AP includes: a control frame transmission unit that generates a control frame having information of a subchannel on which the each STA receives a high efficiency preamble of the wireless frame and transmits the control frame on a primary channel being used in a shared manner by the each STA; and a wireless frame transmission unit that sets information of a frequency resource allocated to the each STA to the high efficiency preamble and simultaneously transmits the wireless frame destined for the each STA on the frequency resource allocated to the each STA, and the STA includes a frequency resource selection reception unit that receives the control frame on the primary channel, switches to the subchannel notified by the control frame, demodulates the high efficiency preamble of the wireless frame on the subchannel, switches to the frequency resource notified by the high efficiency preamble, and receives a wireless frame destined for the STA itself on the frequency resource, where the subchannel and the frequency resource are not shared by each STA and the subchannel differs from the frequency resource switched to by the frequency resource selection reception unit.
2. The wireless communication system according to claim 1 , wherein the high efficiency preamble of the wireless frame includes: a first high efficiency preamble that is used for notification of a band in which the each STA demodulates the wireless frame; and a second high efficiency preamble that is used for notification of allocation of the frequency resource allocated to the each STA which is simultaneously transmitted with one of frequency multiplexing and spatial multiplexing, and the second high efficiency preamble is transmitted in one of a bandwidth of the subchannel and a full bandwidth used for the transmission of the wireless frame.
3. The wireless communication system of claim 1 wherein the subchannel has a bandwidth of 20 MHz.
4. A wireless communication system in which a wireless LAN access point (hereinafter referred to as an “AP”) and a plurality of wireless LAN stations (each of which is hereinafter referred to as an “STA”) are connected to each other and the AP simultaneously transmits a wireless frame destined for each STA with frequency division multiple access, wherein the AP includes: a subcarrier information notification unit that adds a subcarrier for information notification which is different from a prescribed subcarrier to a PHY preamble of a wireless frame on a primary channel being used in a shared manner by the each STA, and notifies information of a subchannel on which the each STA receives a high efficiency preamble of the wireless frame by the subcarrier for the information notification; and a wireless frame transmission unit that sets information of a frequency resource allocated to the each STA to the high efficiency preamble and simultaneously transmits the wireless frame destined for the each STA on the frequency resource allocated to the each STA, and the STA includes a frequency resource selection reception unit that detects the subcarrier for the information notification of the PHY preamble of the wireless frame on the primary channel, switches to the subchannel notified by the subcarrier for the information notification, demodulates the high efficiency preamble of the wireless frame on the subchannel, switches to the frequency resource notified by the high efficiency preamble, and receives a wireless frame destined for the STA itself on the frequency resource, where the subchannel and the frequency resource are not shared by each STA and the subchannel differs from the frequency resource switched to by the frequency resource selection reception unit.
5. The wireless communication system according to claim 4 , wherein the PHY preamble is configured with legacy standards an L-STF, an L-LTF, and an L-SIG and the subcarrier for the information notification is added to at least one field of the L-STF, the L-LTF, and the L-SIG.
6. A wireless communication method in which a wireless LAN access point (hereinafter referred to as an “AP”) and a plurality of wireless LAN stations (each of which is hereinafter referred to as an “STA”) are connected to each other and the AP simultaneously transmits a wireless frame destined for each STA with frequency division multiple access, wherein the AP includes: a control frame transmission step generating a control frame having information of a subchannel on which the each STA receives a high efficiency preamble of the wireless frame and transmitting the control frame on a primary channel being used in a shared manner by the each STA; and a wireless frame transmission step setting information of a frequency resource allocated to the each STA to the high efficiency preamble and simultaneously transmitting the wireless frame destined for the each STA on the frequency resource allocated to the each STA, and the STA includes a frequency resource selection reception step receiving the control frame on the primary channel, switching to the subchannel notified by the control frame, demodulating the high efficiency preamble of the wireless frame on the subchannel, switching to the frequency resource notified by the high efficiency preamble, and receiving a wireless frame destined for the STA itself on the frequency resource, where the subchannel and the frequency resource are not shared by each STA and the subchannel differs from the frequency resource switched to by the frequency resource selection reception unit.
7. The wireless communication method according to claim 6 , wherein the high efficiency preamble of the wireless frame includes: a first high efficiency preamble that is used for notification of a band in which the each STA demodulates the wireless frame; and a second high efficiency preamble that is used for notification of allocation of the frequency resource allocated to the each STA which is simultaneously transmitted with one of frequency multiplexing and spatial multiplexing, and the second high efficiency preamble is transmitted in one of a bandwidth of the subchannel and a full bandwidth used for the transmission of the wireless frame.
8. A wireless communication method in which a wireless LAN access point (hereinafter referred to as an “AP”) and a plurality of wireless LAN stations (each of which is hereinafter referred to as an “STA”) are connected to each other and the AP simultaneously transmits a wireless frame destined for each STA with frequency division multiple access, wherein the AP includes: a subcarrier information notification step adding a subcarrier for information notification which is different from a prescribed subcarrier to a PHY preamble of a wireless frame on a primary channel being used in a shared manner by the each STA, and notifying information of a subchannel on which the each STA receives a high efficiency preamble of the wireless frame by the subcarrier for the information notification; and a wireless frame transmission step setting information of a frequency resource allocated to the each STA to the high efficiency preamble and simultaneously transmitting the wireless frame destined for the each STA on the frequency resource allocated to the each STA, and the STA includes a frequency resource selection reception step detecting the subcarrier for the information notification of the PHY preamble of the wireless frame on the primary channel, switching to the subchannel notified by the subcarrier for the information notification, demodulating the high efficiency preamble of the wireless frame on the subchannel, switching to the frequency resource notified by the high efficiency preamble, and receiving a wireless frame destined for the STA itself on the frequency resource, where the subchannel and the frequency resource are not shared by each STA and the subchannel differs from the frequency resource switched to by the frequency resource selection reception unit.
9. The wireless communication method according to claim 8 , wherein the PHY preamble is configured with legacy standards an L-STF, an L-LTF, and an L-SIG and the subcarrier for the information notification is added to at least one field of the L-STF, the L-LTF, and the L-SIG.
10. A wireless LAN access point in a wireless communication system in which the wireless LAN access point and a plurality of wireless LAN stations (each of which is hereinafter referred to as an “STA”) are connected to each other and a wireless frame destined for each STA is transmitted with frequency division multiple access, the wireless LAN access point comprising: a control frame transmission unit that generates a control frame having information of a subchannel on which the each STA receives a high efficiency preamble of the wireless frame and transmits the control frame on a primary channel being used in a shared manner by the each STA; and a wireless frame transmission unit that sets information of a frequency resource allocated to the each STA to the high efficiency preamble and simultaneously transmits the wireless frame destined for the each STA on the frequency resource allocated to the each STA, where the subchannel and the frequency resource are not shared by each STA and the subchannel differs from the frequency resource.
11. A wireless LAN access point in a wireless communication system in which a wireless LAN access point and a plurality of wireless LAN stations (each of which is hereinafter referred to as an “STA”) are connected to each other and a wireless frame destined for each STA is transmitted with frequency division multiple access, the wireless LAN access point comprising: a subcarrier information notification unit that adds a subcarrier for information notification which is different from a prescribed subcarrier to a PHY preamble of a wireless frame on a primary channel being used in a shared manner by the each STA, and notifies information of a subchannel on which the each STA receives a high efficiency preamble of the wireless frame by the subcarrier for the information notification; and a wireless frame transmission unit that sets information of a frequency resource allocated to the each STA to the high efficiency preamble and simultaneously transmits the wireless frame destined for the each STA on the frequency resource allocated to the each STA, where the subchannel and the frequency resource are not shared by each STA and the subchannel differs from the frequency resource.
12. Wireless LAN stations in a wireless communication system in which a wireless LAN access point (hereinafter referred to as an “AP”) and a plurality of wireless LAN stations are connected to each other and the AP simultaneously transmits a wireless frame destined for each of the wireless LAN stations with frequency division multiple access, the wireless LAN stations comprising: a processor; a storage medium having computer program instructions stored thereon, wherein the computer program instructions, when executed by the processor, perform processing of: a frequency resource selection reception unit that receives a control frame transmitted from the AP on a primary channel being used in a shared manner by the each of the wireless LAN stations, switches to a subchannel notified by the control frame, demodulates a high efficiency preamble of the wireless frame on the subchannel, switches to the frequency resource notified by the high efficiency preamble, and receives a wireless frame destined for the each of the wireless LAN stations itself on the frequency resource, where the subchannel and the frequency resource are not shared by each STA and the subchannel differs from the frequency resource switched to by the frequency resource selection reception unit.
13. Wireless LAN stations in a wireless communication system in which a wireless LAN access point (hereinafter referred to as an “AP”) and a plurality of wireless LAN stations are connected to each other and the AP simultaneously transmits a wireless frame destined for each of the wireless LAN stations with frequency division multiple access, the wireless LAN stations comprising: a processor; a storage medium having computer program instructions stored thereon, wherein the computer program instructions, when executed by the processor, perform processing of: a frequency resource selection reception unit that detects a subcarrier for information notification of a PHY preamble of the wireless frame transmitted from the AP on a primary channel being used in a shared manner by the each of the wireless LAN stations, switches to a subchannel notified by the subcarrier for the information notification, demodulates a high efficiency preamble of the wireless frame on the subchannel, switches to the frequency resource notified by the high efficiency preamble, and receives a wireless frame destined for the each of the wireless LAN stations itself on the frequency resource, where the subchannel and the frequency resource are not shared by each STA and the subchannel differs from the frequency resource switched to by the frequency resource selection reception unit.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
March 4, 2016
June 2, 2020
Browse 5M+ US patents with plain-English claim translations and AI-generated analysis.